CN203747583U - Motor - Google Patents
Motor Download PDFInfo
- Publication number
- CN203747583U CN203747583U CN201420151305.8U CN201420151305U CN203747583U CN 203747583 U CN203747583 U CN 203747583U CN 201420151305 U CN201420151305 U CN 201420151305U CN 203747583 U CN203747583 U CN 203747583U
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- coil
- motor
- circuit
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- motor shaft
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Abstract
The utility model provides a motor which comprises a motor body and a motor shaft, wherein the motor body is provided with an encoder connected with a driver of the motor through an encoder signal line. The motor further comprises a housing fixed on the motor body, a first coil wound on the motor shaft, a second loop fixed on the housing, an AC excitation circuit fixed on the housing and connected with the second coil, a rectifying circuit fixed on the motor shaft and connected with the first coil, a foil gauge type sensing circuit fixed on the motor shaft and connected with the rectifying circuit, a modulation circuit fixed on the motor shaft and respectively connected with the foil gauge type sensing circuit and the first coil, and a demodulation circuit fixed on the housing and respectively connected with the second coil and the encoder signal line. The fist coil and the second coil form a transformer. The motor is reduced in size, simplified in components and lower in cost.
Description
Technical field
The utility model relates to a kind of motor, particularly a kind of motor with torque detecting apparatus.
Background technology
Motor conventionally need to detect its moment of torsion and determine the parameters such as its rotating speed.Traditional electric machine torque measurement method is the electric current by detecting motor winding, according to the moment of torsion of Current calculation motor.But, because the electric current of motor exists very great fluctuation process, be therefore difficult to accurately obtain the moment of torsion of motor.In order to solve the problems of the technologies described above, prior art mainly by add one independently torque sensor (being called discrete torque sensor below) measure the moment of torsion of motor.Particularly, existing discrete torque sensor one end is connected with motor by a shaft coupling, and the other end such as, is connected with load equipment (lathe or pump etc. are by the equipment of driven by motor) by another shaft coupling.This torque sensor comprises stator and rotor, needs to arrange bearing between stator and rotor, to make the rotor can be with respect to stator rotation.Meanwhile, also need a support to fix stator.
Utility model content
The utility model aims to provide the motor moment of torsion detection scheme that a kind of volume is little, simple in structure, cost is low.
The utility model provides a kind of motor, and it comprises a motor body and a motor shaft, wherein on motor body, is provided with an encoder, and described encoder is connected with the driver of motor by a code device signal line; Wherein, this motor also comprises:
A shell, it is fixed on described motor body;
First coil, it is wound on described motor shaft;
Second coil, it is fixed on described shell, and described the first coil and described the second coil form a transformer;
AC excitation circuit, it is fixed on described shell, and is connected with described the second coil;
Rectification circuit, it is fixed on described motor shaft, and is connected with described the first coil;
Strain chip sensing circuit, it is fixed on described motor shaft, and is connected with described rectification circuit;
Modulation circuit, it is fixed on described motor shaft, and is connected with described strain chip sensing circuit and described the first coil respectively;
Demodulator circuit, it is fixed on described shell, and is connected with described the second coil and described code device signal line respectively.
Preferably, described strain chip sensing circuit comprises:
At least two foil gauges, it is connected with described rectification circuit;
Strain measurement circuit, it is connected with described at least two foil gauges and described modulation circuit respectively.
Preferably, described foil gauge sticks on described motor shaft.
As above, preferably, described rectification circuit comprises a diode and an electric capacity; One end of described diode is connected with described the first coil, and the other end of described diode is connected with described foil gauge; One end of described electric capacity is connected with the other end of described diode, and the other end of described electric capacity is connected with described the first coil.
In such scheme of the present utility model, fixed housing on motor body is fixed the second coil on shell, coiling the first coil on motor shaft, AC excitation circuit is by the first coil, the second coil and rectification circuit, to strain chip sensing circuit and modulation circuit power supply.In the time that motor shaft bears moment of torsion, strain chip sensing circuit produces the voltage signal under deformation by modulation circuit, the first coil, the second coil and demodulator circuit transmission foil gauge, thus the moment of torsion while obtaining motor shaft rotation.Because the first coil is wound on motor shaft, the second coil is fixed on shell, and AC excitation reconciliation circuit demodulation circuit is fixed on shell, rectification circuit, strain chip sensing circuit and modulation circuit are fixed on motor shaft, therefore can effectively reduce volume.And, to compare with discrete torque sensor of the prior art, such scheme does not need the parts such as shaft coupling, bearing and stator support are set again, thereby has simplified the structure of transducer.In addition, demodulator circuit and encoder common signal line in such scheme, be transferred to voltage signal the driver of motor, Motor torque monitored according to voltage signal with the driver of power supply machine, due to without special holding wire transmission voltage signal is set, therefore effectively reduce cost.
Brief description of the drawings
Describe below with reference to accompanying drawings preferred embodiment of the present utility model in detail, understand above-mentioned and other feature and advantage of the present utility model with the person of ordinary skill in the art is more clear that, in accompanying drawing:
Fig. 1 is a kind of structural representation of the utility model motor;
Fig. 2 is the schematic perspective view of the motor shown in Fig. 1;
Fig. 3 is a kind of fundamental diagram of the circuit part of motor in the utility model;
Fig. 4 is a kind of concrete structure schematic diagram of the circuit part shown in Fig. 3.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, by the following examples the utility model is further described.
Embodiment mono-
Fig. 1 is a kind of structural representation of the utility model motor.As shown in Figure 1, the motor of the present embodiment comprises a motor body 11 and a motor shaft 12.On motor body 11, be fixed with shell 16.In Fig. 1 for the concrete parts that comprise in shell 16 to be shown, therefore with shadow representation shell 16.On motor body 11, be also provided with an encoder 13, this encoder 13 is connected with a driver 15 of this motor by a code device signal line 14.Code device signal line 14 can be optical fiber.
Fig. 2 is the schematic perspective view of the motor shown in Fig. 1.Fig. 2 mainly shows concrete parts and the structure thereof of motor body 11 and electronical line shaft 12 in Fig. 1.Shell 16 is fixed on motor body 11.For example shell 16 is fixed on motor body 11 by screw or welding manner.The first coil 17 is wound on motor shaft 11.The second coil 18 is fixed on shell 16.The first coil 17 and the second coil 18 form a transformer.In Fig. 2, also show motor and be arranged on the circuit part A on motor shaft.Circuit part A comprises: rectification circuit 20, foil gauge sensing circuit 21 and modulation circuit 22 (three circuit all specifically illustrate in Fig. 3).Also it should be noted that, in the present embodiment, the second coil 18 can be bonded on shell 16 with seccotine, also can be fixed on shell 16 by an intermediate member, for example can, by a cylinder being fixed on shell 16, make the second coil 18 be wound on cylinder upper.
Fig. 3 is a kind of fundamental diagram of the circuit part of motor in the utility model.As shown in Figure 3, an AC excitation circuit 19 is fixed on shell 16, is connected with the second coil 18.The effect of AC excitation circuit 19 is to produce high frequency voltage, for the second coil 18 provides electric energy.The first coil 17 and the second coil 18 form a transformer.Rectification circuit 20 is fixed on motor shaft 12, is connected with the first coil 17.Foil gauge sensing circuit 21 is fixed on this motor shaft 12, is connected with rectification circuit 20; Modulation circuit 22 is fixed on this motor shaft 12, is connected respectively with strain chip sensing circuit 21 and the first coil 17; Demodulator circuit 23 is fixed on shell 16, is connected respectively with the second coil 18 and code device signal line 14.
In the present embodiment, AC excitation circuit 19 provides high frequency voltage to transformer.Rectification circuit 20 is converted to alternating voltage after direct voltage, and foil gauge sensing circuit 21 and modulation circuit 22 are powered.Foil gauge sensing circuit 21 mainly comprises foil gauge, and in the time that motor shaft bears moment of torsion, foil gauge, along with deformation occurs together in the strain of motor shaft, the resistance value of foil gauge is changed, thereby the voltage of foil gauge also can change.Therefore, can obtain the moment of torsion of motor shaft by gathering the voltage signal of foil gauge.The voltage signal of foil gauge is transferred to modulation circuit 22, modulation circuit 22 generates high-frequency voltage signal, and by transformer, high-frequency voltage signal is transferred to demodulator circuit 23, for demodulator circuit 23, this high-frequency voltage signal is carried out to demodulation, obtain voltage signal, and then can obtain according to voltage signal the moment of torsion of motor shaft.Simultaneously, demodulator circuit 23 is also connected with the code device signal line 14 of encoder 13 by cable etc., thereby can voltage signal be sent on the driver 15 of the motor being connected with code device signal line 14 by code device signal line 14, Motor torque be regulated according to voltage signal for motor driver 15.
It should be noted that, in the utility model, the transformer that only uses a pair of coil 17 and 18 to form just can play the double action of power supply and transfer overvoltage signal.Simple and compact for structure, with low cost.From power supply angle, be that AC excitation circuit 19 consists of high frequency voltage transformer the first coil 17 and the second coil 18 is transferred to rectification circuit 20, rectification circuit 20 is converted to high frequency voltage after direct voltage, and direct voltage is powered to foil gauge sensing circuit 21 and modulation circuit 22.Now, the second coil 18 in transformer is former limit, and the first coil 17 is secondary.From signal angle, when motor shaft bears moment of torsion, foil gauge in foil gauge sensing circuit 21 produces deformation, and gather the voltage signal under this deformation, again voltage signal is transferred to modulation circuit 22, modulation circuit 22 generates high-frequency voltage signal, by transformer, this high-frequency voltage signal is transferred to demodulator circuit 23, obtains voltage signal so that demodulator circuit 23 carries out demodulation to high-frequency voltage signal.Now, the first coil 17 of transformer is former limit, and the second coil 18 is secondary.
In the present embodiment, fixed housing 16 on motor body 11, on this shell, fix the second coil 18, coiling the first coil 17 on motor shaft 12, the first coil 17 and the second coil 18 form a transformer, AC excitation circuit 19, by transformer and rectification circuit 20, is powered to strain chip sensing circuit 21 and modulation circuit 22.Meanwhile, in the time that motor shaft bears moment of torsion, the voltage signal that strain chip sensing circuit produces its foil gauge under deformation transmits by modulation circuit, the first coil 1, the second coil 18 and demodulator circuit 23, thus the moment of torsion while obtaining motor shaft rotation.Compare with existing discrete torque sensor, because the first coil 17 of the present utility model is directly wound on motor shaft 12, the second coil 18 is directly fixed on shell 16, and AC excitation circuit 19 and demodulator circuit 23 are fixed on shell 16, rectification circuit 20, strain chip sensing circuit 21 and modulation circuit 22 are fixed on motor shaft 12, do not need the parts such as shaft coupling, bearing and stator support are set again, therefore can effectively save space.And, simplified the structure of motor, and then reduced torque sensor cost.Simultaneously, the utility model makes moment of torsion testing circuit and encoder share a holding wire, voltage signal is transferred to the driver 15 of motor, driver 15 with power supply machine is monitored Motor torque according to voltage signal, the voltage signal that need not separately join holding wire transmission foil gauge, therefore can reduce costs effectively.
Embodiment bis-
Fig. 4 is a kind of concrete structure schematic diagram of the circuit part shown in Fig. 3.On the basis of above-described embodiment one, this strain chip sensing circuit 21 specifically comprises at least two foil gauges 211 and strain measurement circuit 212; Wherein, at least two foil gauges 211 are connected with rectification circuit 20; Strain measurement circuit 212 is connected with at least two foil gauges 211 and modulation circuit 22 respectively.
In the present embodiment, introduce in detail the technical scheme of the present embodiment as an example of four foil gauges 211 example: in the time that motor shaft 12 bears moment of torsion, four foil gauges 211 are due to the generation deformation that meets with stresses, and corresponding variation occurs its resistance value.Obtain corresponding voltage signal by strain measurement circuit 212 according to this deformation, and the voltage signal of this foil gauge 211 is transferred to modulation circuit 22, modulation circuit 22 generates high-frequency voltage signal, and by transformer, high-frequency voltage signal is transferred to demodulator circuit 23, for demodulator circuit 23, this high-frequency voltage signal is carried out to demodulation, obtain voltage signal, thereby can, according to this voltage signal, obtain the moment of torsion of motor shaft.Meanwhile, demodulator circuit 23 can also send to this voltage signal by the code device signal line 14 of encoder 13 motor driver 15 being connected with code device signal line 14, Motor torque is monitored according to voltage signal for motor driver 15.
In addition, it should be noted that, can also adopt in the present embodiment two foil gauges.The accuracy of detection of 4 foil gauges is higher than the accuracy of detection of 2 foil gauges.Can determine according to actual needs suitable foil gauge quantity.And except the form shown in Fig. 4, foil gauge 211 can also configure in a variety of forms, for example two perpendicular Eight characters form, full-bridge form or half-bridge forms.
Alternatively, foil gauge 211 sticks on motor shaft 12, and bonding method can be realized in the time that motor shaft 12 bears moment of torsion, makes foil gauge 211 produce deformation along with the variation of motor shaft 12 stress.In the present embodiment, preferably adopt seccotine to paste, which can guarantee that foil gauge is the same with the deformation quantity of motor shaft.
Referring to Fig. 4, alternatively, rectification circuit 20 comprises diode and electric capacity; One end of this diode is connected with this first coil 17, and the other end of this diode is connected with foil gauge 211; One end of this electric capacity is connected with the other end of this diode, and the other end of this electric capacity is connected with this first coil 17.
In the present embodiment, the rectification circuit consisting of diode and electric capacity not only makes circuit structure simple, can also have effectively and realize alternating current is converted to direct current, to power to strain chip sensing circuit 21 and modulation circuit 22.
The foregoing is only preferred embodiment of the present utility model and oneself; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (4)
1. a motor, it comprises a motor body (11) and a motor shaft (12), wherein on motor body (11), be provided with an encoder (13), described encoder (13) is connected with the driver (15) of motor by a code device signal line (14); It is characterized in that, this motor also comprises:
A shell (16), it is fixed on described motor body (11);
First coil (17), it is wound on described motor shaft (12);
Second coil (18), it is upper that it is fixed on described shell (16), and described the first coil (17) and the second coil (18) form a transformer;
One AC excitation circuit (19), it is upper that it is fixed on described shell (16), and be connected with described the second coil (18);
One rectification circuit (20), it is upper that it is fixed on described motor shaft (12), and be connected with described the first coil (17);
One strain chip sensing circuit (21), it is upper that it is fixed on described motor shaft (12), and be connected with described rectification circuit (20);
One modulation circuit (22), it is upper that it is fixed on described motor shaft (12), and be connected with described strain chip sensing circuit (21) and described the first coil (17) respectively;
One demodulator circuit (23), it is upper that it is fixed on described shell (16), and be connected with described the second coil (18) and described code device signal line (14) respectively.
2. motor according to claim 1, is characterized in that, described strain chip sensing circuit (21) comprising:
At least two foil gauges (211), it is connected with described rectification circuit (20);
Strain measurement circuit (212), it is connected with described at least two foil gauges and described modulation circuit (22) respectively.
3. motor according to claim 2, is characterized in that, described foil gauge (211) sticks on described motor shaft.
4. motor according to claim 2, is characterized in that, described rectification circuit (20) comprises a diode and an electric capacity; One end of described diode is connected with described the first coil (17), and the other end of described diode is connected with described foil gauge (211); One end of described electric capacity is connected with the other end of described diode, and the other end of described electric capacity is connected with described the first coil (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151305.8U CN203747583U (en) | 2014-03-31 | 2014-03-31 | Motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151305.8U CN203747583U (en) | 2014-03-31 | 2014-03-31 | Motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203747583U true CN203747583U (en) | 2014-07-30 |
Family
ID=51347339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420151305.8U Expired - Fee Related CN203747583U (en) | 2014-03-31 | 2014-03-31 | Motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203747583U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233635A (en) * | 2018-03-03 | 2018-06-29 | 房县忠意设备有限公司 | A kind of motor for automatically adjusting torque |
-
2014
- 2014-03-31 CN CN201420151305.8U patent/CN203747583U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233635A (en) * | 2018-03-03 | 2018-06-29 | 房县忠意设备有限公司 | A kind of motor for automatically adjusting torque |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20210331 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |